2649540679 has 2 divisors, whose sum is σ = 2649540680. Its totient is φ = 2649540678.

The previous prime is 2649540653. The next prime is 2649540697. The reversal of 2649540679 is 9760459462.

Together with next prime (2649540697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2649540679 - 2¹⁵ = 2649507911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2649540479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324770339 + 1324770340.

It is an arithmetic number, because the mean of its divisors is an integer number (1324770340).

Almost surely, 2^2649540679 is an apocalyptic number.

2649540679 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649540679 is an equidigital number, since it uses as much as digits as its factorization.

2649540679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The square root of 2649540679 is about 51473.6891916637. The cubic root of 2649540679 is about 1383.7475466935.

The spelling of 2649540679 in words is "two billion, six hundred forty-nine million, five hundred forty thousand, six hundred seventy-nine".